NO. 2136. REVISION OF THE GENUS APHYCVS—TIMBERLAKE. 587 



Genus APHYCUS Mayr. 

 Aphycus Mayr, Verb, zool.-bot. Ges. Wien, vol. 25, 1876, p. 695. 



Female. — Head rounded triangular, the occiput concave, the 

 dorsal aspect rounded, the plane of front meeting the facial plane 

 at nearly a right angle, but the angulation rounded off; face nearly 

 flat, sloping downward and backward to the mouth, antennal scrobes 

 usually rather weak, well separated by the facial prominence of 

 cuneate form; cheeks nearly as long as the greatest diameter of the 

 eyes; front and vertex varying considerably in width, but usually 

 much longer than wide; arrangement of ocelli varying from an acute 

 to a right-angled triangle. Antennae inserted close to the mouth, 

 their bases well separated; 11-jointed, comparatively short, pubes- 

 cent; the scape flattened vertically, either linear or with a broad 

 leaflike expansion below; pedicel obconical, usually about as long 

 as the first three funicle joints, sometimes a little shorter; funicle 

 joints in most cases wider than long and increasing noticeably 

 in width distad; club rather large, either pointed or truncate at 

 apex, in shape more or less oval, generally wider than the funicle 

 and about two-thirds as long. Mandibles tridentate with the nearly 

 equal teeth rather blunt. Thorax of about the same width as head, 

 robust, the mesoscutum considerably wider than long, the axillae 

 cuneate, meeting medially, the scutellum subtriangular, with 

 rounded base and rather acutely angled apex. Abdomen usually 

 of the same width as thorax and a little shorter, flattened horizontally, 

 ovate to broadly ovate, the apex rather obtusely rounded, the ovi- 

 positor not inclosed by the fifth ventral sclerite which reaches about 

 to the center of the venter; the ovipositor sheaths reaching to the 

 apex of abdomen or slightly beyond, more rarely protruded to any 

 considerable length; dorsal vibrissae of abdomen situated about one- 

 third the total length of abdomen from its base. Legs rather short, 

 the middle tibial spur short and stout, not as long as the basal tarsal 

 jomt. Wings either hyaline, with an integumentary spot, or 

 banded with areas of dense, dark-colored cilia; oblique hairless 

 streak always present, running from the stigmal vein proximad nearly 

 if not quite to the posterior border of wing; submarginal vein not 

 reaching to the middle of wing except m some of the smaller, short- 

 winged species; marginal vein punctiform, the postmarginal reduced 

 to a mere spur, stigmal vein moderate in length and straight; costal 

 cell of hind wing narrow but extending to the hooldets. 



Sculpture of head and thorax alutaceous, not punctate; head, 

 including eyes, frequently but not conspicuously pubescent; mesono- 

 tum with a grayish or white recumbent vestiture of scattered hairs, 

 rather short and stiff, especially prominent in the dark-colored 

 species. Coloration always nonmetallic, of varying shades of ycl- 



